References:
1- Neuropsychopharmacology Laboratory, Brain Sciences Institute, Swinburne, University of Technology, Victoria, Australia.
The acute effects of L-theanine in comparison with alprazolam on anticipatory anxiety in humans.
Hum Psychopharmacol. 2004 Oct;19(7):457-65
2- L-theanine a unique amino acid of green tea and its relaxation effect in humans
Trends in Food Science & Technology, Volume 10, Issue 12, December 1999, Page 425.